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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "media/cast/rtp_receiver/receiver_stats.h" | 5 #include "media/cast/rtp_receiver/receiver_stats.h" |
| 6 | 6 |
| 7 #include "base/logging.h" | 7 #include "base/logging.h" |
| 8 #include "media/cast/rtp_receiver/rtp_receiver_defines.h" | 8 #include "media/cast/rtp_receiver/rtp_receiver_defines.h" |
| 9 | 9 |
| 10 namespace media { | 10 namespace media { |
| (...skipping 19 matching lines...) Expand all Loading... |
| 30 uint32* jitter) { | 30 uint32* jitter) { |
| 31 // Compute losses. | 31 // Compute losses. |
| 32 if (interval_number_packets_ == 0) { | 32 if (interval_number_packets_ == 0) { |
| 33 *fraction_lost = 0; | 33 *fraction_lost = 0; |
| 34 } else { | 34 } else { |
| 35 int diff = 0; | 35 int diff = 0; |
| 36 if (interval_wrap_count_ == 0) { | 36 if (interval_wrap_count_ == 0) { |
| 37 diff = max_sequence_number_ - interval_min_sequence_number_ + 1; | 37 diff = max_sequence_number_ - interval_min_sequence_number_ + 1; |
| 38 } else { | 38 } else { |
| 39 diff = kMaxSequenceNumber * (interval_wrap_count_ - 1) + | 39 diff = kMaxSequenceNumber * (interval_wrap_count_ - 1) + |
| 40 (max_sequence_number_ - interval_min_sequence_number_ + | 40 (max_sequence_number_ - interval_min_sequence_number_ + |
| 41 kMaxSequenceNumber + 1); | 41 kMaxSequenceNumber + 1); |
| 42 } | 42 } |
| 43 | 43 |
| 44 if (diff < 1) { | 44 if (diff < 1) { |
| 45 *fraction_lost = 0; | 45 *fraction_lost = 0; |
| 46 } else { | 46 } else { |
| 47 *fraction_lost = static_cast<uint8>((256 * (1 - | 47 float tmp_ratio = |
| 48 static_cast<float>(interval_number_packets_) / abs(diff)))); | 48 (1 - static_cast<float>(interval_number_packets_) / abs(diff)); |
| 49 *fraction_lost = static_cast<uint8>(256 * tmp_ratio); |
| 49 } | 50 } |
| 50 } | 51 } |
| 51 | 52 |
| 52 int expected_packets_num = max_sequence_number_ - min_sequence_number_ + 1; | 53 int expected_packets_num = max_sequence_number_ - min_sequence_number_ + 1; |
| 53 if (total_number_packets_ == 0) { | 54 if (total_number_packets_ == 0) { |
| 54 *cumulative_lost = 0; | 55 *cumulative_lost = 0; |
| 55 } else if (sequence_number_cycles_ == 0) { | 56 } else if (sequence_number_cycles_ == 0) { |
| 56 *cumulative_lost = expected_packets_num - total_number_packets_; | 57 *cumulative_lost = expected_packets_num - total_number_packets_; |
| 57 } else { | 58 } else { |
| 58 *cumulative_lost = kMaxSequenceNumber * (sequence_number_cycles_ - 1) + | 59 *cumulative_lost = |
| 60 kMaxSequenceNumber * (sequence_number_cycles_ - 1) + |
| 59 (expected_packets_num - total_number_packets_ + kMaxSequenceNumber); | 61 (expected_packets_num - total_number_packets_ + kMaxSequenceNumber); |
| 60 } | 62 } |
| 61 | 63 |
| 62 // Extended high sequence number consists of the highest seq number and the | 64 // Extended high sequence number consists of the highest seq number and the |
| 63 // number of cycles (wrap). | 65 // number of cycles (wrap). |
| 64 *extended_high_sequence_number = (sequence_number_cycles_ << 16) + | 66 *extended_high_sequence_number = |
| 65 max_sequence_number_; | 67 (sequence_number_cycles_ << 16) + max_sequence_number_; |
| 66 | 68 |
| 67 *jitter = static_cast<uint32>(abs(jitter_.InMillisecondsRoundedUp())); | 69 *jitter = static_cast<uint32>(abs(jitter_.InMillisecondsRoundedUp())); |
| 68 | 70 |
| 69 // Reset interval values. | 71 // Reset interval values. |
| 70 interval_min_sequence_number_ = 0; | 72 interval_min_sequence_number_ = 0; |
| 71 interval_number_packets_ = 0; | 73 interval_number_packets_ = 0; |
| 72 interval_wrap_count_ = 0; | 74 interval_wrap_count_ = 0; |
| 73 } | 75 } |
| 74 | 76 |
| 75 void ReceiverStats::UpdateStatistics(const RtpCastHeader& header) { | 77 void ReceiverStats::UpdateStatistics(const RtpCastHeader& header) { |
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| 93 } | 95 } |
| 94 max_sequence_number_ = new_seq_num; | 96 max_sequence_number_ = new_seq_num; |
| 95 } | 97 } |
| 96 | 98 |
| 97 // Compute Jitter. | 99 // Compute Jitter. |
| 98 base::TimeTicks now = clock_->NowTicks(); | 100 base::TimeTicks now = clock_->NowTicks(); |
| 99 base::TimeDelta delta_new_timestamp = | 101 base::TimeDelta delta_new_timestamp = |
| 100 base::TimeDelta::FromMilliseconds(header.webrtc.header.timestamp); | 102 base::TimeDelta::FromMilliseconds(header.webrtc.header.timestamp); |
| 101 if (total_number_packets_ > 0) { | 103 if (total_number_packets_ > 0) { |
| 102 // Update jitter. | 104 // Update jitter. |
| 103 base::TimeDelta delta = (now - last_received_packet_time_) - | 105 base::TimeDelta delta = |
| 106 (now - last_received_packet_time_) - |
| 104 ((delta_new_timestamp - last_received_timestamp_) / 90); | 107 ((delta_new_timestamp - last_received_timestamp_) / 90); |
| 105 jitter_ += (delta - jitter_) / 16; | 108 jitter_ += (delta - jitter_) / 16; |
| 106 } | 109 } |
| 107 last_received_timestamp_ = delta_new_timestamp; | 110 last_received_timestamp_ = delta_new_timestamp; |
| 108 last_received_packet_time_ = now; | 111 last_received_packet_time_ = now; |
| 109 | 112 |
| 110 // Increment counters. | 113 // Increment counters. |
| 111 ++total_number_packets_; | 114 ++total_number_packets_; |
| 112 ++interval_number_packets_; | 115 ++interval_number_packets_; |
| 113 } | 116 } |
| 114 | 117 |
| 115 } // namespace cast | 118 } // namespace cast |
| 116 } // namespace media | 119 } // namespace media |
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